Shock-absorbing apparatus



T. A. GANNON.

SHOCK ABSORBING AFPAR'I'US.A

APPLICATION FILED APR. L9 1920.

1,407,745 Patented Feb. 28, 1922.

PATENT OFFICE.

TIMOTHY A. GANNON, 0F SOMERVILLE, MASSACHUSETTS.

SHOCK-ABSORBING APPARATUS.

Application filed April 19, 1920.

T0 all whom t may concern:

Be it known that I, TIMOTHY A. GANNoN, residing at Somerville, W'inter Hill district, in the county of Middlesex and State ot Massachusetts, have invented a new and use ful Shock-Absorbing Apparatus, of which the following is a speciiication.

My invention relates to improvements in shock-absorbers for use in conjunction with regular or ordinary springs on all kinds of motor vehicles; and the objects of my improvement are first, to provide a means for eliminating shocks of the road incident to motor travel which are not taken up by the regular or ordinary springs of the motor vehicle; second, to lessen the strain of the load on the springs of the motor vehicle caused by sudden jolt-s or shocks due to the uneven condition of the roadway.

I attain these objects by the mechanism illustrated in the accompanying drawings in which- Figure l is a side elevation partly in section of the entire machine or apparatus aitiXed to the motor vehicle; Figure 2 is a bottom plan View of the machine as it appears detached from the motor vehicle.

Similar numbers used on the drawing refer to similar parts throughout the several views.

The metal cylinder casting (l) which is hollow and which has two parallel projections extending from it constitutes the frame work of the apparatus. The spiral spring (3) is placed inside on the bottom of the cylinder casting (l). The lever (5) which pivots on the bolt (8), supported by the two parallel projections of the cylindrical casting (l) is attached at the long end to the semi-elliptical spring (7) of the vehicle and at the short end is secured by the bolt (l0) to the rod (4) which rod passes through the Specification of Letters Patent.

Patented Feb. 28, 1922.

Serial No. 375,158.

opening in the bottom of the cylindrical casting and thus up through the center of the spiral spring and is secured to the circular cap (9) by the nut (l2).

Thecylindrical casting (l) is fitted with a metal cover (2) which is threaded to allow it to be screwed on or off the cylindrical casting.

The hollow cylindrical casting (l) with its two metal projections at the bottom, which are a part of the cylindrical casting, is attached to the frame or chassis (6) by the bolts (ll).

The shocks of the road are transmitted from the ordinary'spring (7) of the vehicle to the long end oi' the lever (5) which conveys the shock by means of the rod (et) to the spiral spring which absorbs the shock.

I am aware that prior to my invention, shock-absorbers have been made in which springs have been used; but I claim:

In a shock absorber for vehicles, the combination of a casing rigid with the frame of the vehicle, a cap screwed on upper end of said casing, a rigid annular spring abutment iormed on the inner wall of said casing, a slidable spring abutment within said casing, a spiral spring vertically positioned within said casing and bearing at its lower' end against said rigid annular spring abutment, two parallel projections extending from the lower end of said casing, a fulcruin-pin passing through apertures in said parallel projections, a rocking lever provided with a long and a short arm pivoting on said ful- Crum-pin and connected at its long end to the vehicle spring, an operative connection between the short arm oiI said rocking lever and said slidable spring abutment.

TIMOTHY A. GANNON 

